#! /bin/sh
# Evoke a segfault in a hard-to-reach code path of kwset.c.
# This bug affected grep versions 2.19 through 2.21.
#
# Copyright (C) 2015-2020 Free Software Foundation, Inc.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.

# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

. "${srcdir=.}/init.sh"; path_prepend_ ../src

fail=0

# This test case chooses a haystack of size 260,000, since prodding
# with gdb showed a reallocation slightly larger than that in fillbuf.
# To reach the buggy code, the needle must have length < 1/11 that of
# the haystack, and 10,000 is a nice round number that fits the bill.
printf '%0260000dXy\n' 0 | returns_ 1 grep -F $(printf %010000dy 0) \
  || fail=1

Exit $fail
